that president obama has proposed so far. mark greenblatt, abc news, new york. >> thank you, mark. of course, the president signed several executive orders. that was the first salvo in all of this. now the tougher battle is capitol hill. even senator feinstein said the chances of this getting passed are unlikely but it's a battle worth having. we'll see what happens once it hits capitol hill. >> i think most americans, especially after newtown, they do support some sort of gun control. perhaps not an aggressive form of gun control, but something. so why wouldn't it at least be possible? >> if the public is for it, you think capitol hill would respond. from '94 to 2004 in this country, we had an assault weapons ban. and you listen to people who supported it they say it worked and had the effect. you listen to the nra and other folks who say it didn't work. i just want to see one final concrete, nonpartisan study that says did the one we did from '94 to 2004 really work? >> there was studies, though. >> there was, but they alwa